A type of iron ion Fe 3+ Doped spinel-structured fluorogallate near-infrared phosphors, their preparation methods, and their applications in medical flaw detection.
By preparing Fe3+-doped spinel-structured fluorogallate near-infrared phosphors, the problems of easy oxidation and chromium toxicity of Cr3+-doped phosphors were solved, achieving high-efficiency near-infrared luminescence performance and biocompatibility, making them suitable for non-destructive testing in biomedicine.
Patent Information
- Application Number
- CN202311610397.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-11-29
- Publication Date
- 2026-06-02
- Estimated Expiration
- 2043-11-29
AI Technical Summary
Existing Cr3+ doped phosphors are easily oxidized during preparation and use, leading to increased energy loss and reduced luminescence efficiency. Furthermore, the toxicity of chromium limits their application in the biomedical field. Fe3+ doped phosphors are limited in luminescence efficiency, making it difficult to meet the needs of non-destructive testing in biomedicine.
A method for preparing Fe3+-doped spinel-structured fluorogallate near-infrared phosphors was developed. This method involves calcining a compound of MgGa2O4:xFe3+ and yF- in an air atmosphere to repair oxygen vacancies, thereby forming an Fe3+-doped spinel structure with F-repaired oxygen defects. This method produces near-infrared phosphors that are both environmentally friendly and biocompatible.
It achieved a 10nm redshift of the emission peak, increased the integrated intensity by 15.6 times, and maintained 85.10% of the luminous intensity at 423K, meeting the requirements of LED devices. Furthermore, the raw material cost is low and the preparation method is simple and effective.